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T cell regulatory genes associated with immune disease

a technology of immune disease and regulatory genes, applied in the field of immune disease, can solve the problems of increased asthma prevalence, poor understanding of susceptibility, and direct treatment costs exceeding $11 billion per annum, and achieve the effect of preventing the development of atopy and reducing or terminating immunological disorders

Inactive Publication Date: 2005-05-05
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] In another embodiment of the invention, atopic individuals, particularly individuals having a TIM-1 genotype with at least one 157insMTTTVP allele, are contacted with HAV or binding mimetics thereof, to diminish or terminate immunological disorders, such as atopy. In another embodiment of the invention, individuals having a TIM-1 genotype with at least one 157insMTTTVP allele, are contacted with HAV or binding mimetics thereof to prevent the development atopy or other immunological diseases.

Problems solved by technology

Asthma is the most common chronic disease of childhood and affects more than 15 million individuals in the United States, leading to direct treatment costs exceeding $11 billion per annum.
However, the specific molecular pathways that result in the increased asthma prevalence, and the genetic polymorphisms that confer asthma susceptibility are poorly understood.
Moreover, because the effects of genetic variation in any single gene are likely to have only modest effects in the overall pathogenesis of asthma, and because gene-gene and gene-environment interactions confound the analysis, the location of putative susceptibility genes to regions amenable to positional cloning has proven difficult to refine.
However, the large size of the linked region of 5q complicates its analysis, and a gene for asthma from this site has not yet been conclusively identified.

Method used

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  • T cell regulatory genes associated with immune disease
  • T cell regulatory genes associated with immune disease
  • T cell regulatory genes associated with immune disease

Examples

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example 2

Identification of Human Tim Sequences

[0164] The positional cloning of the TIM gene family within a locus that confers protection against the development of Th2 responses and allergen-induced airway hyperreactivity provides an opportunity to greatly improve our understanding of the regulation of Th2 driven responses and atopic diseases. In addition, TIM-3 is specifically expressed on murine Th1 cells and anti-TIM-3 mAb leads to increased severity of experimental autoimmune encephalomyelitis (EAE). This emphasizes the importance of the gene family in T helper subset regulation.

[0165] The human Tim cDNAs, which are the orthologues of murine Tim-3 and Tim-4 were cloned by PCR. The human orthologue of TIM-1 was cloned as HAVcr-1, the cellular receptor for hepatitis A virus. The TIM family genes are immediately adjacent to each other on human chromosome 5, in the order TIM-4, TIM-1, TIM-3, with no intervening genes. There are TIM pseudogenes on chromosomes 12 and 19. The gene family mem...

example 3

Expression of Tim Sequences

[0176] Murine TIM-3 protein is expressed on Th1 clones but not on naive T cells or Th2 cells. Using TCR transgenic T cells, TIM-3 protein was not expressed on Th1 cells after one or two rounds of Th1-directed differentiation but was expressed after the third and further rounds of Th1 stimulation. TIM-3 mRNA expression was detected somewhat earlier. In order to determine if TIM-3 gene expression was the same in human, TIM-3 and TIM-1 mRNA expression in human Th1 cells was examined using tetanus toxoid specific T cells generated by stimulation with antigen in the presence of IL-12 and anti IL-4 mAb. Given the association of TIM-1 with asthma, TIM-1 and TIM-3 mRNA expression in human Th2 cells was examined. Th2 cell lines were generated from allergic donors by in vitro stimulation with allergen, IL-4, and anti IL-12 mAb. RNA was analyzed by PCR for TIM gene expression.

[0177] TIM-3 was generally expressed after Th1 differentiation whereas TIM-1 was lost. Con...

example 4

TIM Ligands and Antibodies

[0179] Generation of Antibodies. Generation of monoclonal antibodies against mouse TIM-1 allows examination of the cell surface expression of TIM-1 in different tissues, cell lines and mouse strains. Both alleles of mouse TIM-1 have been cloned into a vector for high protein expression (Invitrogen, pEF6-TOPO). Rats have been immunized and boosted with both Tim1 cDNA constructs to rapidly generate antibodies against cell surface molecules. This method with cDNA vaccination favors the production of mAb against cell surface epitopes since the Tim1 cDNA will be taken up by APC, which will express the TIM-1 as a cell surface molecule. In order to generate mAb that would bind equally well to both the BALB / c and the HBA TIM-1 (by binding to conserved domains of TIM-1 such as the Immunoglobulin domain of TIM-1), both the BALB / c and HBA Tim1 cDNA (pEF6-mTIMbalb and pEF6-mTIMhba) were injected into each rat.

[0180] Further boosting of the Tim1 cDNA-immunized rats wa...

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Abstract

A genetic locus and corresponding family of proteins associated with regulation of immune development, function, and cell survival are provided. The locus comprising the TIM family is genetically associated with immune dysfunction, including atopy, autoimmunity, inflammatory bowel disease, dysplasia, and susceptibility to blood-bourne infectious diseases. Polymorphisms in the human TIM-1 gene and exposure to Hepatitis A Virus (HAV) are shown to be associated with protection from the development of atopy.

Description

BACKGROUND OF THE INVENTION [0001] Atopy, which includes asthma, allergic rhinitis, and atopic dermatitis, is a complex trait that arises as a result of environmentally induced immune responses in genetically susceptible individuals. The prevalence of all atopic diseases has dramatically increased in industrialized countries over the past two decades. Asthma is the most common chronic disease of childhood and affects more than 15 million individuals in the United States, leading to direct treatment costs exceeding $11 billion per annum. Epidemiological studies have suggested that the increase in asthma prevalence results from changes in hygiene and from reduced frequency of infections (e.g., tuberculosis or hepatitis A) within industrialized society. However, the specific molecular pathways that result in the increased asthma prevalence, and the genetic polymorphisms that confer asthma susceptibility are poorly understood. [0002] Expression of asthma is influenced by multiple enviro...

Claims

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Application Information

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IPC IPC(8): A61KC07K14/705C12Q1/68
CPCC07K14/70503C12Q2600/156C12Q2600/106C12Q1/6883C12Q2600/136C12Q2600/158C12Q2600/172
Inventor MCINTIRE, JENNIFERDEKRUYFF, ROSEMARIEUMETSU, DALEFREEMAN, GORDON
Owner THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIV
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